I live in Melbourne too and love it. Yes, the weather isn’t like Perth or Qld (I’ve lived in Perth too), but it’s a fabulous city with so much going on and probably the most ‘European’ feeling city in Australia. Despite what you read about Australia on here sometimes, there’s lots of theatre, art galleries, ballet, film festivals, music etc etc. The food scene is also fab.
We have fairly mild winters, by UK standards, but we can drive up to the mountains for snow if we feel like it (I rarely do!). People are out doing sport, cycling, walking etc in winter because it’s pretty mild and we don’t tend to get the really long spells of heatwaves that other parts get in summer, although they do happen. It was 37 on Saturday here and the National parks were closed due to the extreme fire danger, but as the poster above says, it’s going to be 24 today and definitely feeling autumnal. I have a down jacket and never need more than that and winter is much shorter and brighter than the UK.
i can certainly understand why your pils would want to come here (I’m also nearly 60, but have been a citizen for 20 years), but I think it’ll be a long hard/expensive road for them. They should consider what many of my friends parents do and come for 3 months a year and if they want to extend their visit, pop over to NZ or Asia and get a new visitor visa for another 3 months. They won’t be able to work and their only access to Medicare would be through the reciprocal healthcare arrangement, but lots of people come with good comprehensive medical insurance, so accessing private healthcare is fairly easy.
One thing they should consider very carefully is leaving friends behind (as well as you, obviously). It’s much, much harder to make friends at our age than when we had young children. It can feel very isolating if you don’t make an effort to go out and join in with things. One thing I and many of my expat/immigrant friends have found is that Australians are very friendly in a superficial way, but it can be very hard to develop deep friendships. I have some amazing Aussie friends now, but it was tough to start with. Many of us say that Brits are more open and there is definitely a difference between us despite a common language. If your pils are outgoing they’ll find it easier, but being here for three months is not the same as living here!
I go back to the UK twice a year, which I love doing, but it’s very expensive to do and yes, housing is really expensive depending on where you want to live. Grocery shopping costs more, but bizarrely, eating out really doesn’t. Petrol is cheaper as are energy prices (comparing with my friends and family in UK anyway).
I think if they’re determined to do it, they’ll probably find a way, but it won’t be easy. I feel for you, it’s the worst bit about being on the other side of the world and something you do get used to even if it’s sad at times.